PD8-6060 Explosion-Proof Dual Analog Input Process Meter
Instruction Manual
56
Round Horizontal Tank
Linearization (
rHt
)
This function automatically calculates the volume in a
round horizontal tank with flat ends.
The volume is calculated based on the diameter and
length of the tank. The tank’s dimensions can be
entered in inches or centimeters; the meter automatically
calculates the volume in gallons or liters. After entering
the dimensions, complete the scaling process with the
display values calculated by the meter. The meter can
be re-scaled to display the volume in any engineering
unit without the need to re-enter the dimensions again.
Note:
After Scale is displayed continue pressing the Enter
button until the meter completes the scaling of the input and
display values.
Changing the Volume from Gallons to
Liters
In the graphic above, entering 48" for the diameter
and 120" for the length of the round horizontal tank,
the meter automatically calculates that the volume of
the tank is 940.02 gallons.
1. Convert gallons to liters
1 US gallon = 3.7854 L
940.02 gal = 3558.4 L
2. Go to the
Setup
menu and change the
decimal point to 1 decimal.
3. Go to the
Program
–
Scale
menu and press
Enter until
dis 2
is shown on the main display.
4. Press Enter and change display 2 value to 3558.4.
5. The meter is now displaying the volume in liters.
Note:
The display can be scaled to display the volume in
any engineering units.
Another way to display the volume in liters is to
enter the dimensions in cm. The meter
automatically calculates the volume in liters.
Math Function (
nmath
)
The
Math
menu is used to select the math function
that will determine the channel C value. These math
functions are a combination of input channels A and
B, and will display when channel C is selected in the
Display
menu.
The following math functions are available.
Name
Function
Setting
Addition
(A+B+P)*F
Sunm
Difference
(A-B+P)*F
diF
Absolute diff.
((Abs(A-B))+P)*F
diFAbS
Average
(((A+B)/2)+P)*F
AvG
Multiplication
((A*B)+P)*F
nmulti
Division
((A/B)+P)*F
diVide
Max of A or B
((AB-Hi)+P)*F
Hi-Ab
Min of A or B
((AB-Lo)+P)*F
Lo-Ab
Draw
((A/B)-1)*F
drAuw
Weighted avg.
((B-A)*F)+A
uw avg
Ratio
(A/B)*F
ratio
Ratio 2
((B-A)/A)+P)*F
ratio2
Concentration
(A/(A+B))*F
Concen
Math Constants (
Const
)
The
Math Constants
menu is used to set the
constants used in channel C math. The math
functions include input channel A and B, as well as
the adder constant P, and factor constant F.
The
Adder
constant (P) may be set from -99.999 to
999.999.
The
Factor
constant (F) may be set from 0.001 to
chart above details the
math functions that may be selected in the Math
Functions menu.
Low-Flow Cutoff (
CutofF
)
The low-flow cutoff feature allows the meter to be
programmed so that the often-unsteady output from a
differential pressure transmitter, at low flow rates,
always displays zero on the meter.
The cutoff value may be programmed from 0.1 to
999999. The meter will display zero below the cutoff
value. Programming the cutoff value to zero disables
the cutoff feature. The cutoff can be disabled to
display negative values.
